高力罕凹陷查干诺尔洼槽储层特征研究

Study on Reservoir Characteristics of Chaganuoer Gutter in Gaolihan Depression

近年来,高力罕凹陷查干诺尔洼槽钻探证实,主要含油气层分布在腾格尔一段和阿尔善组,为勘探的主力目的层。利用现有的录井、岩心、薄片、测井等资料,对主力含油层系储层的岩性、电性、物性进行综合分析。研究表明,研究区碎屑岩储层的成份成熟度及结构成熟度均较低,岩石岩屑含量及泥质杂基含量均较高,以微细喉道为主的孔隙连通性较差,储层物性属低孔特低渗,在洼槽纵横向展布上具有变化趋势特征。

In recent years,the drilling of Chaganuoer sag in Gaolihan depression confirmed that the main hydrocarbon-bearing strata are distributed in the Tengger section and the Alshan Formation,which is the main target layer for exploration.This paper uses the existing logging,core,thin section,logging and other data to comprehensively analyze the lithology,electrical properties and physical properties of the main oil-bearing strata reservoirs.The research shows that the compositional maturity and structural maturity of the clastic reservoirs in the study area are low,the rock debris content and the argillaceous heterogeneous content are high,and the pore connectivity dominated by the fine throat is poor.The layer properties are low-porosity and low-permeability,and have a tendency to change in the longitudinal and lateral distribution of the gutter.